Hopefully it's not too late to resurrect this one from the dead, I was looking at the PakSat thread earlier and wondering just how far east my dish could go before it hit the limit. When I set it up I'd adjusted the actuator to hit the internal limiter by being completely in then backed off one revolution, it was then clamped up with the barest minimum protuding from the clamp and the Vbox limiter set 10 pulses in from the endstop. So, anyway it would seem that the limit is absolutely spot on 40°E because when I scanned C band for any bumps I saw the unmistakable peaks from AMC-1 even with the plate in! What makes this quite so surprising is the angle must be nearly obscured by a large tree about 10m away, I'll take a pic tomorrow to show what I mean but for now some grabs of tonights reception.
Added this morning, the view taken from the back of the feed with two markers at 40E and 20E, not sure PakSat or 5A are going to be do-able looking at this.